Software and web development

• TkParal
  TkParal is an X Window interface for the Paral program of the former Radio Continuum Group of the Max-Planck-Institut für Radioastronomie, Bonn. Paral/TkParal is a convenient tool to plan observing runs at various telescopes. Based on source position and observatory coordinates it calculates azimuth, elevation, parallactic angle, rise and set times and some more parameters.
• APEX "Phase 2" project submission
  I developed the web-based "phase 2" project submission system for APEX projects, starting in 2005 and constantly improving it until 2017. It has been used by many observers from ESO and Onsala, and is still used by the Chilean community for the project preparation.

Observing techniques

• Fast On-The-Fly Continuum Mapping
  Many years ago, when bolometer arrays had only a few dozens of channels, fast (or "undersampled") On-The-Fly Mapping was a recommended method for mapping large areas in a reasonable amount of observing time. Nowadays, as bolometer arrays with several hundreds or thousands of channels are in use, this is not so much an issue anymore. My SMTO working report on "Fast OTF Mapping at the HHT" is no longer online anyway, unfortunately.
• Fast Switching Phase Calibration
  As a post-doc at IRAM Grenoble, I was working on some simulations about FSPC and its efficiency in mm-wave interferometry. Fast switching phase calibration is one of the phase correction strategies in use at ALMA. Actually, the need for FSPC in sub-mm interferometry led to the construction of antennas which are capable to move with a rate of various degrees/second, and a consequence of this is that also APEX can move very rapidly between sources. While I still have my results from back then lying around somewhere, I'm sure that more recent (and more advanced) work on this topic is available elsewhere.